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IMPROVEMENT 1N PIsToN-Non PAGNING.

JAMES P. McLEAN D OHN VAN DEROAR, OF BROOKLYN'. NEW YORK,

' ASSIGNORS TO JAMES P. MCLEAN,`

Letters .Patent No; 59,918, dated November 20, 1866..

Q Be it known that we, JAMES P. McLEAN and JOHN VANDERGAR, of thecity of Brooklyn, in the county of `Kings, andStat'e of N ew '.York, haveA invented a new and useful improvement in the Vconstruction of packing for piston rods, or other shafting, for steam or other engines, and we herebyv declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, which are lettered to correspond with and form apart of lthe specification. In order that the public may fully understand our inven'- tion, 'and those skilled in the mechanic arts be enabled 11o-construct and use the same, we will describe it as follows, to wit l i A i Figures l and 2, letters A A, are stuiiing boxes, for a steam engine, having our improved packing, 1', 2., secured in the boxes around the piston rod, B B. A i

Figurevis a perspectivefdrawing of a piece of cylindric packing,'formed of cork and Ieaden strips, with canvas jacket. i

Figure 4 is a perspective drawing of a flat packing, constructed of cork, lead, and canvas.

Our invention consists in the introduction' and nse of cork, N N, and leaden strips, 1,- 2, 3, in the stung hores of steam or other engines also for bearings for shafting, insuch a manner that the leaden strips, 1, 2, 3, will be forced against the piston-rod, shaft, or cylinder, byftlie expansion of the cork, N-NI, iig. 4, which becomes charged with the lubricating matter, or oil, so that it forms a 4lubricating packing of itself if necessary; and on account of its great expansive properties when brought in contact with steam, or moisture, very little attention is necessary to be paid 'to the gland orl follower, L. The superiority of cork and 'loaden strips over the packing that is in common use, is that they are not injuriously affected by steam, anddo not burn on the piston-rod, as is the case with other materials that are in common use. The introduction of cork, back of of the lead, as shown at iig. 4, has the desirable e'ect 'to hold the lead in contact with the rod, or shaft, B B,

by its own expansion, caused by the steam, thereby rendering the' screwing up of the 'stuiiiug-box almost unnecessary. We are aware that copper has been used for steam packing, and that lead has'bcen employed for such purposesseparately; the former' has andinjurious effect upon the piston-rod, by scratching the same, while the lead alone requires constant adjusting of the gland or follower, but the -application of sheet lead as above set forth and shown at gs. 1, 2, 3, 4, we believe to be new and useful.

Therefore, what we claim as new and useful, and what we wish to secure by Letters Patent ofthe United States of America, isi The combination of the cork vN- N, and leaden strips 1, 2, 3, for thepurposes substantially as described, and

shown in the drawings.

In testimony whereof we hereunto subscribe our names, in the presence of two witnesses.`

' i JAMES' P. McLEAN, 4

JOHN VANDERGAR.

Witnesses:

JOHN CURTIS, ANDREW MACKY. 

